Monoprice via Rakuten offers the Monoprice Strata Home Collection El Niño 300 Personal Smoothie Blender for $19.99. Coupon code "HOME20" cuts that to $15.99. With free shipping, that's the lowest price we could find by $7. It features a 300-watt motor and includes two blending/drinking cups.
WD-40 is handy in a lot more situations than you likely realize.